OK, let's work through this together. We're starting with 516 and we're going to multiply it by 491, which means we add 516 to itself 491 times.
Step 1: 0 + 516 = 516
Step 2: 516 + 516 = 1032
Step 3: 1032 + 516 = 1548
Step 4: 1548 + 516 = 2064
Step 5: 2064 + 516 = 2580
Step 6: 2580 + 516 = 3096
Step 7: 3096 + 516 = 3612
Step 8: 3612 + 516 = 4128
Step 9: 4128 + 516 = 4644
Step 10: 4644 + 516 = 5160
Step 11: 5160 + 516 = 5676
Step 12: 5676 + 516 = 6192
Step 13: 6192 + 516 = 6708
Step 14: 6708 + 516 = 7224
Step 15: 7224 + 516 = 7740
Step 16: 7740 + 516 = 8256
Step 17: 8256 + 516 = 8772
Step 18: 8772 + 516 = 9288
Step 19: 9288 + 516 = 9804
Step 20: 9804 + 516 = 10320
Step 21: 10320 + 516 = 10836
Step 22: 10836 + 516 = 11352
Step 23: 11352 + 516 = 11868
Step 24: 11868 + 516 = 12384
Step 25: 12384 + 516 = 12900
Step 26: 12900 + 516 = 13416
Step 27: 13416 + 516 = 13932
Step 28: 13932 + 516 = 14448
Step 29: 14448 + 516 = 14964
Step 30: 14964 + 516 = 15480
Step 31: 15480 + 516 = 15996
Step 32: 15996 + 516 = 16512
Step 33: 16512 + 516 = 17028
Step 34: 17028 + 516 = 17544
Step 35: 17544 + 516 = 18060
Step 36: 18060 + 516 = 18576
Step 37: 18576 + 516 = 19092
Step 38: 19092 + 516 = 19608
Step 39: 19608 + 516 = 20124
Step 40: 20124 + 516 = 20640
Step 41: 20640 + 516 = 21156
Step 42: 21156 + 516 = 21672
Step 43: 21672 + 516 = 22188
Step 44: 22188 + 516 = 22704
Step 45: 22704 + 516 = 23220
Step 46: 23220 + 516 = 23736
Step 47: 23736 + 516 = 24252
Step 48: 24252 + 516 = 24768
Step 49: 24768 + 516 = 25284
Step 50: 25284 + 516 = 25800
Step 51: 25800 + 516 = 26316
Step 52: 26316 + 516 = 26832
Step 53: 26832 + 516 = 27348
Step 54: 27348 + 516 = 27864
Step 55: 27864 + 516 = 28380
Step 56: 28380 + 516 = 28896
Step 57: 28896 + 516 = 29412
Step 58: 29412 + 516 = 29928
Step 59: 29928 + 516 = 30444
Step 60: 30444 + 516 = 30960
Step 61: 30960 + 516 = 31476
Step 62: 31476 + 516 = 31992
Step 63: 31992 + 516 = 32508
Step 64: 32508 + 516 = 33024
Step 65: 33024 + 516 = 33540
Step 66: 33540 + 516 = 34056
Step 67: 34056 + 516 = 34572
Step 68: 34572 + 516 = 35088
Step 69: 35088 + 516 = 35604
Step 70: 35604 + 516 = 36120
Step 71: 36120 + 516 = 36636
Step 72: 36636 + 516 = 37152
Step 73: 37152 + 516 = 37668
Step 74: 37668 + 516 = 38184
Step 75: 38184 + 516 = 38700
Step 76: 38700 + 516 = 39216
Step 77: 39216 + 516 = 39732
Step 78: 39732 + 516 = 40248
Step 79: 40248 + 516 = 40764
Step 80: 40764 + 516 = 41280
Step 81: 41280 + 516 = 41796
Step 82: 41796 + 516 = 42312
Step 83: 42312 + 516 = 42828
Step 84: 42828 + 516 = 43344
Step 85: 43344 + 516 = 43860
Step 86: 43860 + 516 = 44376
Step 87: 44376 + 516 = 44892
Step 88: 44892 + 516 = 45408
Step 89: 45408 + 516 = 45924
Step 90: 45924 + 516 = 46440
Step 91: 46440 + 516 = 46956
Step 92: 46956 + 516 = 47472
Step 93: 47472 + 516 = 47988
Step 94: 47988 + 516 = 48504
Step 95: 48504 + 516 = 49020
Step 96: 49020 + 516 = 49536
Step 97: 49536 + 516 = 50052
Step 98: 50052 + 516 = 50568
Step 99: 50568 + 516 = 51084
Step 100: 51084 + 516 = 51600
Step 101: 51600 + 516 = 52116
Step 102: 52116 + 516 = 52632
Step 103: 52632 + 516 = 53148
Step 104: 53148 + 516 = 53664
Step 105: 53664 + 516 = 54180
Step 106: 54180 + 516 = 54696
Step 107: 54696 + 516 = 55212
Step 108: 55212 + 516 = 55728
Step 109: 55728 + 516 = 56244
Step 110: 56244 + 516 = 56760
Step 111: 56760 + 516 = 57276
Step 112: 57276 + 516 = 57792
Step 113: 57792 + 516 = 58308
Step 114: 58308 + 516 = 58824
Step 115: 58824 + 516 = 59340
Step 116: 59340 + 516 = 59856
Step 117: 59856 + 516 = 60372
Step 118: 60372 + 516 = 60888
Step 119: 60888 + 516 = 61404
Step 120: 61404 + 516 = 61920
Step 121: 61920 + 516 = 62436
Step 122: 62436 + 516 = 62952
Step 123: 62952 + 516 = 63468
Step 124: 63468 + 516 = 63984
Step 125: 63984 + 516 = 64500
Step 126: 64500 + 516 = 65016
Step 127: 65016 + 516 = 65532
Step 128: 65532 + 516 = 66048
Step 129: 66048 + 516 = 66564
Step 130: 66564 + 516 = 67080
Step 131: 67080 + 516 = 67596
Step 132: 67596 + 516 = 68112
Step 133: 68112 + 516 = 68628
Step 134: 68628 + 516 = 69144
Step 135: 69144 + 516 = 69660
Step 136: 69660 + 516 = 70176
Step 137: 70176 + 516 = 70692
Step 138: 70692 + 516 = 71208
Step 139: 71208 + 516 = 71724
Step 140: 71724 + 516 = 72240
Step 141: 72240 + 516 = 72756
Step 142: 72756 + 516 = 73272
Step 143: 73272 + 516 = 73788
Step 144: 73788 + 516 = 74304
Step 145: 74304 + 516 = 74820
Step 146: 74820 + 516 = 75336
Step 147: 75336 + 516 = 75852
Step 148: 75852 + 516 = 76368
Step 149: 76368 + 516 = 76884
Step 150: 76884 + 516 = 77400
Step 151: 77400 + 516 = 77916
Step 152: 77916 + 516 = 78432
Step 153: 78432 + 516 = 78948
Step 154: 78948 + 516 = 79464
Step 155: 79464 + 516 = 79980
Step 156: 79980 + 516 = 80496
Step 157: 80496 + 516 = 81012
Step 158: 81012 + 516 = 81528
Step 159: 81528 + 516 = 82044
Step 160: 82044 + 516 = 82560
Step 161: 82560 + 516 = 83076
Step 162: 83076 + 516 = 83592
Step 163: 83592 + 516 = 84108
Step 164: 84108 + 516 = 84624
Step 165: 84624 + 516 = 85140
Step 166: 85140 + 516 = 85656
Step 167: 85656 + 516 = 86172
Step 168: 86172 + 516 = 86688
Step 169: 86688 + 516 = 87204
Step 170: 87204 + 516 = 87720
Step 171: 87720 + 516 = 88236
Step 172: 88236 + 516 = 88752
Step 173: 88752 + 516 = 89268
Step 174: 89268 + 516 = 89784
Step 175: 89784 + 516 = 90300
Step 176: 90300 + 516 = 90816
Step 177: 90816 + 516 = 91332
Step 178: 91332 + 516 = 91848
Step 179: 91848 + 516 = 92364
Step 180: 92364 + 516 = 92880
Step 181: 92880 + 516 = 93396
Step 182: 93396 + 516 = 93912
Step 183: 93912 + 516 = 94428
Step 184: 94428 + 516 = 94944
Step 185: 94944 + 516 = 95460
Step 186: 95460 + 516 = 95976
Step 187: 95976 + 516 = 96492
Step 188: 96492 + 516 = 97008
Step 189: 97008 + 516 = 97524
Step 190: 97524 + 516 = 98040
Step 191: 98040 + 516 = 98556
Step 192: 98556 + 516 = 99072
Step 193: 99072 + 516 = 99588
Step 194: 99588 + 516 = 100104
Step 195: 100104 + 516 = 100620
Step 196: 100620 + 516 = 101136
Step 197: 101136 + 516 = 101652
Step 198: 101652 + 516 = 102168
Step 199: 102168 + 516 = 102684
Step 200: 102684 + 516 = 103200
Step 201: 103200 + 516 = 103716
Step 202: 103716 + 516 = 104232
Step 203: 104232 + 516 = 104748
Step 204: 104748 + 516 = 105264
Step 205: 105264 + 516 = 105780
Step 206: 105780 + 516 = 106296
Step 207: 106296 + 516 = 106812
Step 208: 106812 + 516 = 107328
Step 209: 107328 + 516 = 107844
Step 210: 107844 + 516 = 108360
Step 211: 108360 + 516 = 108876
Step 212: 108876 + 516 = 109392
Step 213: 109392 + 516 = 109908
Step 214: 109908 + 516 = 110424
Step 215: 110424 + 516 = 110940
Step 216: 110940 + 516 = 111456
Step 217: 111456 + 516 = 111972
Step 218: 111972 + 516 = 112488
Step 219: 112488 + 516 = 113004
Step 220: 113004 + 516 = 113520
Step 221: 113520 + 516 = 114036
Step 222: 114036 + 516 = 114552
Step 223: 114552 + 516 = 115068
Step 224: 115068 + 516 = 115584
Step 225: 115584 + 516 = 116100
Step 226: 116100 + 516 = 116616
Step 227: 116616 + 516 = 117132
Step 228: 117132 + 516 = 117648
Step 229: 117648 + 516 = 118164
Step 230: 118164 + 516 = 118680
Step 231: 118680 + 516 = 119196
Step 232: 119196 + 516 = 119712
Step 233: 119712 + 516 = 120228
Step 234: 120228 + 516 = 120744
Step 235: 120744 + 516 = 121260
Step 236: 121260 + 516 = 121776
Step 237: 121776 + 516 = 122292
Step 238: 122292 + 516 = 122808
Step 239: 122808 + 516 = 123324
Step 240: 123324 + 516 = 123840
Step 241: 123840 + 516 = 124356
Step 242: 124356 + 516 = 124872
Step 243: 124872 + 516 = 125388
Step 244: 125388 + 516 = 125904
Step 245: 125904 + 516 = 126420
Step 246: 126420 + 516 = 126936
Step 247: 126936 + 516 = 127452
Step 248: 127452 + 516 = 127968
Step 249: 127968 + 516 = 128484
Step 250: 128484 + 516 = 129000
Step 251: 129000 + 516 = 129516
Step 252: 129516 + 516 = 130032
Step 253: 130032 + 516 = 130548
Step 254: 130548 + 516 = 131064
Step 255: 131064 + 516 = 131580
Step 256: 131580 + 516 = 132096
Step 257: 132096 + 516 = 132612
Step 258: 132612 + 516 = 133128
Step 259: 133128 + 516 = 133644
Step 260: 133644 + 516 = 134160
Step 261: 134160 + 516 = 134676
Step 262: 134676 + 516 = 135192
Step 263: 135192 + 516 = 135708
Step 264: 135708 + 516 = 136224
Step 265: 136224 + 516 = 136740
Step 266: 136740 + 516 = 137256
Step 267: 137256 + 516 = 137772
Step 268: 137772 + 516 = 138288
Step 269: 138288 + 516 = 138804
Step 270: 138804 + 516 = 139320
Step 271: 139320 + 516 = 139836
Step 272: 139836 + 516 = 140352
Step 273: 140352 + 516 = 140868
Step 274: 140868 + 516 = 141384
Step 275: 141384 + 516 = 141900
Step 276: 141900 + 516 = 142416
Step 277: 142416 + 516 = 142932
Step 278: 142932 + 516 = 143448
Step 279: 143448 + 516 = 143964
Step 280: 143964 + 516 = 144480
Step 281: 144480 + 516 = 144996
Step 282: 144996 + 516 = 145512
Step 283: 145512 + 516 = 146028
Step 284: 146028 + 516 = 146544
Step 285: 146544 + 516 = 147060
Step 286: 147060 + 516 = 147576
Step 287: 147576 + 516 = 148092
Step 288: 148092 + 516 = 148608
Step 289: 148608 + 516 = 149124
Step 290: 149124 + 516 = 149640
Step 291: 149640 + 516 = 150156
Step 292: 150156 + 516 = 150672
Step 293: 150672 + 516 = 151188
Step 294: 151188 + 516 = 151704
Step 295: 151704 + 516 = 152220
Step 296: 152220 + 516 = 152736
Step 297: 152736 + 516 = 153252
Step 298: 153252 + 516 = 153768
Step 299: 153768 + 516 = 154284
Step 300: 154284 + 516 = 154800
Step 301: 154800 + 516 = 155316
Step 302: 155316 + 516 = 155832
Step 303: 155832 + 516 = 156348
Step 304: 156348 + 516 = 156864
Step 305: 156864 + 516 = 157380
Step 306: 157380 + 516 = 157896
Step 307: 157896 + 516 = 158412
Step 308: 158412 + 516 = 158928
Step 309: 158928 + 516 = 159444
Step 310: 159444 + 516 = 159960
Step 311: 159960 + 516 = 160476
Step 312: 160476 + 516 = 160992
Step 313: 160992 + 516 = 161508
Step 314: 161508 + 516 = 162024
Step 315: 162024 + 516 = 162540
Step 316: 162540 + 516 = 163056
Step 317: 163056 + 516 = 163572
Step 318: 163572 + 516 = 164088
Step 319: 164088 + 516 = 164604
Step 320: 164604 + 516 = 165120
Step 321: 165120 + 516 = 165636
Step 322: 165636 + 516 = 166152
Step 323: 166152 + 516 = 166668
Step 324: 166668 + 516 = 167184
Step 325: 167184 + 516 = 167700
Step 326: 167700 + 516 = 168216
Step 327: 168216 + 516 = 168732
Step 328: 168732 + 516 = 169248
Step 329: 169248 + 516 = 169764
Step 330: 169764 + 516 = 170280
Step 331: 170280 + 516 = 170796
Step 332: 170796 + 516 = 171312
Step 333: 171312 + 516 = 171828
Step 334: 171828 + 516 = 172344
Step 335: 172344 + 516 = 172860
Step 336: 172860 + 516 = 173376
Step 337: 173376 + 516 = 173892
Step 338: 173892 + 516 = 174408
Step 339: 174408 + 516 = 174924
Step 340: 174924 + 516 = 175440
Step 341: 175440 + 516 = 175956
Step 342: 175956 + 516 = 176472
Step 343: 176472 + 516 = 176988
Step 344: 176988 + 516 = 177504
Step 345: 177504 + 516 = 178020
Step 346: 178020 + 516 = 178536
Step 347: 178536 + 516 = 179052
Step 348: 179052 + 516 = 179568
Step 349: 179568 + 516 = 180084
Step 350: 180084 + 516 = 180600
Step 351: 180600 + 516 = 181116
Step 352: 181116 + 516 = 181632
Step 353: 181632 + 516 = 182148
Step 354: 182148 + 516 = 182664
Step 355: 182664 + 516 = 183180
Step 356: 183180 + 516 = 183696
Step 357: 183696 + 516 = 184212
Step 358: 184212 + 516 = 184728
Step 359: 184728 + 516 = 185244
Step 360: 185244 + 516 = 185760
Step 361: 185760 + 516 = 186276
Step 362: 186276 + 516 = 186792
Step 363: 186792 + 516 = 187308
Step 364: 187308 + 516 = 187824
Step 365: 187824 + 516 = 188340
Step 366: 188340 + 516 = 188856
Step 367: 188856 + 516 = 189372
Step 368: 189372 + 516 = 189888
Step 369: 189888 + 516 = 190404
Step 370: 190404 + 516 = 190920
Step 371: 190920 + 516 = 191436
Step 372: 191436 + 516 = 191952
Step 373: 191952 + 516 = 192468
Step 374: 192468 + 516 = 192984
Step 375: 192984 + 516 = 193500
Step 376: 193500 + 516 = 194016
Step 377: 194016 + 516 = 194532
Step 378: 194532 + 516 = 195048
Step 379: 195048 + 516 = 195564
Step 380: 195564 + 516 = 196080
Step 381: 196080 + 516 = 196596
Step 382: 196596 + 516 = 197112
Step 383: 197112 + 516 = 197628
Step 384: 197628 + 516 = 198144
Step 385: 198144 + 516 = 198660
Step 386: 198660 + 516 = 199176
Step 387: 199176 + 516 = 199692
Step 388: 199692 + 516 = 200208
Step 389: 200208 + 516 = 200724
Step 390: 200724 + 516 = 201240
Step 391: 201240 + 516 = 201756
Step 392: 201756 + 516 = 202272
Step 393: 202272 + 516 = 202788
Step 394: 202788 + 516 = 203304
Step 395: 203304 + 516 = 203820
Step 396: 203820 + 516 = 204336
Step 397: 204336 + 516 = 204852
Step 398: 204852 + 516 = 205368
Step 399: 205368 + 516 = 205884
Step 400: 205884 + 516 = 206400
Step 401: 206400 + 516 = 206916
Step 402: 206916 + 516 = 207432
Step 403: 207432 + 516 = 207948
Step 404: 207948 + 516 = 208464
Step 405: 208464 + 516 = 208980
Step 406: 208980 + 516 = 209496
Step 407: 209496 + 516 = 210012
Step 408: 210012 + 516 = 210528
Step 409: 210528 + 516 = 211044
Step 410: 211044 + 516 = 211560
Step 411: 211560 + 516 = 212076
Step 412: 212076 + 516 = 212592
Step 413: 212592 + 516 = 213108
Step 414: 213108 + 516 = 213624
Step 415: 213624 + 516 = 214140
Step 416: 214140 + 516 = 214656
Step 417: 214656 + 516 = 215172
Step 418: 215172 + 516 = 215688
Step 419: 215688 + 516 = 216204
Step 420: 216204 + 516 = 216720
Step 421: 216720 + 516 = 217236
Step 422: 217236 + 516 = 217752
Step 423: 217752 + 516 = 218268
Step 424: 218268 + 516 = 218784
Step 425: 218784 + 516 = 219300
Step 426: 219300 + 516 = 219816
Step 427: 219816 + 516 = 220332
Step 428: 220332 + 516 = 220848
Step 429: 220848 + 516 = 221364
Step 430: 221364 + 516 = 221880
Step 431: 221880 + 516 = 222396
Step 432: 222396 + 516 = 222912
Step 433: 222912 + 516 = 223428
Step 434: 223428 + 516 = 223944
Step 435: 223944 + 516 = 224460
Step 436: 224460 + 516 = 224976
Step 437: 224976 + 516 = 225492
Step 438: 225492 + 516 = 226008
Step 439: 226008 + 516 = 226524
Step 440: 226524 + 516 = 227040
Step 441: 227040 + 516 = 227556
Step 442: 227556 + 516 = 228072
Step 443: 228072 + 516 = 228588
Step 444: 228588 + 516 = 229104
Step 445: 229104 + 516 = 229620
Step 446: 229620 + 516 = 230136
Step 447: 230136 + 516 = 230652
Step 448: 230652 + 516 = 231168
Step 449: 231168 + 516 = 231684
Step 450: 231684 + 516 = 232200
Step 451: 232200 + 516 = 232716
Step 452: 232716 + 516 = 233232
Step 453: 233232 + 516 = 233748
Step 454: 233748 + 516 = 234264
Step 455: 234264 + 516 = 234780
Step 456: 234780 + 516 = 235296
Step 457: 235296 + 516 = 235812
Step 458: 235812 + 516 = 236328
Step 459: 236328 + 516 = 236844
Step 460: 236844 + 516 = 237360
Step 461: 237360 + 516 = 237876
Step 462: 237876 + 516 = 238392
Step 463: 238392 + 516 = 238908
Step 464: 238908 + 516 = 239424
Step 465: 239424 + 516 = 239940
Step 466: 239940 + 516 = 240456
Step 467: 240456 + 516 = 240972
Step 468: 240972 + 516 = 241488
Step 469: 241488 + 516 = 242004
Step 470: 242004 + 516 = 242520
Step 471: 242520 + 516 = 243036
Step 472: 243036 + 516 = 243552
Step 473: 243552 + 516 = 244068
Step 474: 244068 + 516 = 244584
Step 475: 244584 + 516 = 245100
Step 476: 245100 + 516 = 245616
Step 477: 245616 + 516 = 246132
Step 478: 246132 + 516 = 246648
Step 479: 246648 + 516 = 247164
Step 480: 247164 + 516 = 247680
Step 481: 247680 + 516 = 248196
Step 482: 248196 + 516 = 248712
Step 483: 248712 + 516 = 249228
Step 484: 249228 + 516 = 249744
Step 485: 249744 + 516 = 250260
Step 486: 250260 + 516 = 250776
Step 487: 250776 + 516 = 251292
Step 488: 251292 + 516 = 251808
Step 489: 251808 + 516 = 252324
Step 490: 252324 + 516 = 252840
Step 491: 252840 + 516 = 253356

So, 516*491 = 253356